Device and method for graduated encoding of a multichannel audio signal based on a principal component analysis
First Claim
1. A scalable coding method of a multi-channel audio signal (C1, . . . , CM), wherein the method comprises the steps of:
- transforming, using a principal component analysis (PCA), at least two channels (L,R) of the audio signal into a principal component (CP) and at least one residual sub-component (r) by rotation defined by a transformation parameter (θ
);
forming a residual structure (Sfr) per frequency subband on the basis of the at least one residual sub-component (r); and
forming a coded audio signal (SC) comprising the principal component (CP), the residual structure (Sfr) of at least one frequency subband, according to a determined order of transmission of the residual structures of the frequency subbands and the transformation parameter (θ
).
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Abstract
A system and a method for the scalable coding of a multi-channel audio signal comprising a principal component analysis (PCA) transformation of at least two channels (L, R) of the audio signal into a principal component (CP) and at least one residual sub-component (r) by rotation defined by a transformation parameter (θ), comprising the following steps: formation of a frequency subband-based residual structure (Sfr) on the basis of the at least one residual sub-component (r), and definition of a coded audio signal (SC) comprising the principal component (CP), at least one residual structure (Sfr) of a frequency subband and the transformation parameter (θ).
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Citations
21 Claims
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1. A scalable coding method of a multi-channel audio signal (C1, . . . , CM), wherein the method comprises the steps of:
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transforming, using a principal component analysis (PCA), at least two channels (L,R) of the audio signal into a principal component (CP) and at least one residual sub-component (r) by rotation defined by a transformation parameter (θ
);forming a residual structure (Sfr) per frequency subband on the basis of the at least one residual sub-component (r); and forming a coded audio signal (SC) comprising the principal component (CP), the residual structure (Sfr) of at least one frequency subband, according to a determined order of transmission of the residual structures of the frequency subbands and the transformation parameter (θ
). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A scalable encoder of a multi-channel audio signal (C1, . . . , CM), comprising transformation means based on principal component analysis (PCA) transforming at least two channels (L, R) of the audio signal into a principal component (CP) and at least one residual sub-component (r) by rotation defined by a transformation parameter (θ
- , θ
(bi)), wherein the encoder comprises;structure formation means for forming a residual structure (Sfr) per frequency subband on the basis of the at least one residual sub-component (r); and defining means for defining a coded audio signal (SC) comprising the principal component (CP), the residual structure (Sfr) of at least one frequency subband, according to a determined order of transmission of the residual structures of the frequency subbands, and the transformation parameter (θ
).
- , θ
Specification